This is a breakout board for Energy Meter using Current Transformer SCT-013.
Voltage is measured using 9VAC transformer. The project is still in testing.
The design is using reference from https://openenergymonitor.org/emon/
Reference:
https://openenergymonitor.org/emon/buildingblocks/ct-sensors-interface
https://openenergymonitor.org/emon/buildingblocks/measuring-voltage-with-an-acac-power-adapter